956, (1 11 3) Capital Federal, Argentina The electron impact mass spectral fragmentation of a series of 3-substituted-1,2,3,4-tetrahydroisoquinolinc~ are reported. The principal fragmentation modes of these compounds comply with the main generalizations reacbed earlier with simpler systems. Complet
The preferred mode of cycloreversion of some 1,3,4-substituted azetidin-2-ones upon electron impact
β Scribed by Michel Auriel; Edmond De Hoffmann; Philippe Scheers; Etienne Deffense
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 484 KB
- Volume
- 24
- Category
- Article
- ISSN
- 1076-5174
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## Abstract The electron impact ionization mass spectra of dipyrido [1,2β__a__:4,3β__d__]pyrimidinones are strongly influenced by the degree of aromaticity of the fused rings. The molecular ions of the compounds are fairly stable. The main routes of fragmentation involve formation of the [M β H]^+^